Tonto Hills Paving

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The Maricopa County Department of Transportation (MCDOT) will be making roadway improvements in the Tonto Hills community beginning Spring of 2024. The improvements will help  to diminish dust by paving roadways and will include drainage improvements minimizing the need for maintenance after storms.  MCDOT previously paved Deer Trail as the pilot project. 

Project Overview

  • Expected construction: Spring 2024 – Spring 2025
  • The project will include the paving of 17 roadway segments throughout the community 
  • Roadway widths will vary between 20 to 24 feet wide 
  • Pavement and rolled curb similar to the segment of Deer Trail Road paved in 2016
  • The drainage patterns will be maintained with low flow crossings at the washes
  • Some retaining walls are proposed to avoid impacting existing washes 
  • Some drainage and slope easements will be required at localized areas
  • Temporary construction easements for grading and driveway reconstruction will be required

Frequently Asked Questions

When will the project be completed?
This project is tentatively scheduled to go to construction in the Spring of 2024 and is expected to be complete by the Spring of 2025.

Will residents have access to their homes during construction?
Residents will always have access in and out of the community. However, there will be times when driveways will be blocked temporarily during construction. Residents will be notified in advance of any access restrictions. 

Will Old Mine Road (from Cave Creek Road to Deer Trail Road) be paved and curbed to match the rest of the community? 
No. That section of Old Mine Road already meets the requirements for dust mitigation and drainage. It does not fall under the scope of work for this project.

Will the existing vegetation in the MCDOT Right of Way be removed?
All vegetation within the MCDOT Right of Way (ROW) is subject to removal. This includes native vegetation and decorative landscaping. Trees and vegetation planted by property owners can be relocated from the MCDOT ROW at the property owners’ expense. Landscaping and structures (rocks, gates, fences, decorative items, lighting, etc.) that are within the MCDOT ROW are also subject to removal; however, MCDOT will work with the property owner to address the need.

Will there be sidewalks or multi-use paths throughout the community?
No. Sidewalks and multi-use paths do not fall under the scope of work for the Tonto Hills Low Volume Road (LVR) project. LVR projects are designed to mitigate dust, improve the roadway surface and drainage, and retain the “look and feel” of the community. The project team designs these improvements to fit within the existing MCDOT Right of Way (ROW) to have minimal impact to property owners. The current ROW within the Tonto Hills community is not wide enough to support the addition of sidewalks or multi-use paths. Adding these would require, at a minimum, an additional 5 to 10 feet of land from property owners to make the ROW wide enough to meet minimum design standards.

I have a large wash that runs through my property. Is it possible to see my parcel plan to address the wash?  
Yes. We can send property owners the proposed design exhibits for their parcel. Please contact Coralie Cole at or (602) 506-8054.

Will the county be responsible for the potential erosion that could happen in the slope easements?
Yes, MCDOT maintenance crews will maintain all slope easements within the community.

Will the roadway improvements affect the Heat Island index?
No. The new pavement and concrete curbing will have little to no effect on the current heat index within the community.

What will be done about speeding on the new roadway?  
If speeding becomes an issue once the project is complete, MCDOT will perform a speed study and determine whether traffic calming devices (speed bumps or striping) are warranted. The posted speed will be 25 mph throughout the community.

What happens if I sell my home, build a home, or want to make improvements to my driveway before this project is completed? 
Any improvements or new builds would have to go through proper channels at Maricopa County Planning & Development ( If you plan to sell your home, please speak with your real estate professional about providing the new owner proper disclosure about the upcoming project. (#TT0609 Tonto Hills Paving

I received a letter from Acquisition Sciences, are they an official subcontractor for MCDOT?
Acquisition Sciences LTD. is a subcontractor for the Maricopa County Real Estate Department (MCRED). The Tonto Hills area is a complex project and the project team wants to make sure we are able to contact property owners in key areas of the project. Acquisition Sciences LTD. was hired by MCRED as a subcontractor to support the project team’s work. If you have received correspondence from a representative, please reach out to them directly.

Will the Tonto Hills Domestic Water Improvement District be impacted by the project?
Part of the design process for this project is to identify underground utilities and determine the need for potential relocation or mitigation. Our project team is working directly with the Tonto Hills Domestic Water Improvement District representatives and other utility representatives. It is possible residents may see these utilities relocated before the project construction begins.


Contact the project team at or (602) 506-3342 or contact or (602) 506-8054.

Title VI

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